as far as the eye can/could see
US /æz fɑr æz ðə aɪ kæn/kʊd siː/
UK /æz fɑr æz ðə aɪ kæn/kʊd siː/

1.
até onde a vista alcança, a perder de vista
over a very large area; as far as the horizon
:
•
The desert stretched out as far as the eye could see.
O deserto se estendia até onde a vista alcançava.
•
From the top of the hill, we could see fields of sunflowers as far as the eye could see.
Do alto da colina, podíamos ver campos de girassóis até onde a vista alcançava.